Phylums and Classes of the Animal Kingdom

The picture above is a cladogram on amphibians, reptiles, mamals, birds, fish. This cladogram shows how species have evolved. Like the tetrapoda how it has evolved into amphibians, reptiles, and mamas. The cladogram starts out with Gnathostomata which evolves into cartilaginous fishes. From their the Gnathostomata evloves into the Osteichthyes which led up to the ray finned fishes. After the Osteichthyes came the Sarcopterygii( Lobe-finned fishes )  then the coelacanth and the lungfish came along. After the Sarcopterygii ( Lobe-finned fishes ) came the tetrapoda ( Amphibians ) which includes caecilians, salamanders, and frogs. After those came the Amminota ( Reptiles and mamals ) which has the most species in it whic include turtles, tuatara, lizards and snakes, crocodilians, birds monotremes, marsupials, and placentals all of these species are similar because they are all in the Amminota( Reptiles and mamals )  section.